Masieve a ma molekyulu a Zeolite amatenga gawo lofunikira pakukonza gasi wachilengedwe pochita ntchito zazikulu zoyeretsera (monga kutaya madzi m'thupi, desulfurization, ndi decarbonization etc.) kudzera pakutsatsa kosankha, chifukwa chake amakweza mpweya wabwino ndikuwonetsetsa kuyenda kotetezeka.
Kuchepa kwa Gasi Wachilengedwe
Gasi wachilengedwe amapangidwa ndi nthunzi wamadzi, ndipo amanyamula madzi enaake amadzimadzi. Kukhalapo kwa madzi mu gasi ndi chinthu choyipa kwambiri, chomwe chimapangitsa kuti mpweya wachilengedwe ukhale wofunikira. Mwachitsanzo:
Madzi ndi methane zimapanga madzi oundana-monga ma hydrate olimba pansi pa kutentha kochepa komanso kupanikizika kwambiri (monga poyendetsa mapaipi kapena njira zothira madzi), zomwe zimatha kutseka mavavu, mapaipi, ndi zida, zomwe zimapangitsa kuti mayendedwe asokonezeke.
Madzi amakumana ndi hydrogen sulfide kapena carbon dioxide mu gasi kuti apange zinthu za acidic (sulfuric acid, carbonic acid), zomwe zimathandizira kuwononga mapaipi ndi zida zachitsulo ndikufupikitsa moyo wawo wantchito.
Gasi wachilengedwe akamafuna kuzizira kwambiri, popeza gasi wachilengedwe (LNG) amayenera kukhazikika mpaka -162 digiri, chinyezi chotsaliracho chimaundana ndikuwononga zida zazikulu monga zosinthira kutentha kwa cryogenic.
Masieve a mamolekyulu, okhala ndi kukula kwake kofananako, amakonda kukopa mamolekyu amadzi. Kuchuluka kwa madzi adsorption ndi okwera mpaka 22% ya kulemera kwawo komwe kumatha kuchepetsa mame a gasi achilengedwe kukhala pansi -70 digiri ndikukwaniritsa kutaya madzi m'thupi.
Kutsekemera kwa Gasi Wachilengedwe
Kutsekemera kwa gasi ndi njira ya desulfurization ndi decarbonization. Hydrogen sulfide ndi carbon dioxide mu gasi wachilengedwe amatha kupanga ma asidi (ndi madzi), ndikupangitsa dzimbiri m'mapaipi ndi zida. Hydrogen sulfide ndi mpweya wapoizoni womwe umakhudza thanzi ndi chitetezo.
Sieve ya molekyulu ikufuna kuchotsa hydrogen sulfide ndi carbon dioxide ku PPM kapena PPB level. Izi zimathandiza kuchepetsa dzimbiri, kuonjezera mtengo wa calorific, ndikukwaniritsa miyezo yamalonda ya gasi wachilengedwe mu khalidwe ndi kayendedwe.
Kuphatikiza pa sulfure wachilengedwe, ma sieve a molekyulu amathanso kukopa sulfure wachilengedwe monga methyl mercaptan, ethyl mercaptan, propyl mercaptan, methyl sulfide, ndi thiophene, zonse zikomo chifukwa cha malo awo akulu enieni komanso kuchuluka kwa pore.
Zeolite Molecular Sieves For Natural Gasi Processing
Type 3A zeolite molecular sieve: Kukula kwake kwa pore ndi 3Å, ndipo amagwiritsidwa ntchito makamaka kutsatsa mamolekyu amadzi okhala ndi m'mimba mwake pafupifupi 2.8Å. Imatha kuchotsa chinyezi kuchokera ku gasi wachilengedwe ndikupewa kutulutsa ma hydrocarbons, ndikupangitsa kuti ikhale yoyenera kutha kwa gasi.
Type 4A zeolite molecular sieve: Kukula kwake kwa pore ndi 4Å, ndipo imatha kusankha mamolekyu amadzi (m'mimba mwake 2.8Å). Imakhalabe ndi mphamvu yowongoka kwambiri pa kutentha kwambiri ndipo ndiyoyenera kuyanika kwambiri gasi. Komabe, ziyenera kudziwidwa kuti imatha kutulutsa ma hydrocarbons owala.
Lembani 5A zeolite molecular sieve: Kukula kwake kwa pore ndi 5Å, ndipo kungagwiritsidwe ntchito pokonza mpweya wachilengedwe kuti adsorption madzi, ma hydrocarbons owala, carbon dioxide, hydrogen sulfide, mercury, ndi zina zotero.
Type 13X zeolite molecular sieve: kukula kwake kwa pore ndi 10Å, ndipo ili ndi mphamvu yotsatsira mpweya wa carbon dioxide, imatha kusungunula mankhwala a sulfure monga hydrogen sulfide ndi mercaptans, kuchotsa zonyansa monga ma hydrocarbon olemera ndi ma hydrocarbon onunkhira muzomera za LNG.
